⚡ HTML / CSS / JS Minifier
Minify HTML, CSS and JavaScript online — strip comments and unnecessary whitespace to shrink files and speed up your site, with instant before/after size comparison. For production JS builds, a full minifier like Terser renames variables too; this tool performs safe whitespace/comment removal.
How to use the HTML / CSS / JS Minifier
- 1 Pick the language tab: HTML, CSS or JavaScript.
- 2 Paste your code and click Minify.
- 3 Check the size savings and copy or download the result.
Frequently asked questions
How much smaller will my files get?
Typical savings: CSS 15–40%, HTML 5–20%, JS 10–30% depending on how heavily commented and formatted the source is. Combined with gzip on your server, transfer sizes drop further.
Is this minification safe?
The tool removes comments and collapses whitespace while respecting strings. It never renames variables. Edge cases exist in unusual JS (e.g. regex literals with unbalanced quotes) — always test output before deploying.
Does minifying improve SEO?
Indirectly, yes — smaller files load faster, and page speed is a Google ranking factor via Core Web Vitals.
Is my code uploaded?
No — minification runs entirely in your browser, so proprietary code stays private.